Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 69: Nanostructures at surfaces: 1D and 2D structures and networks II
O 69.4: Vortrag
Mittwoch, 14. März 2018, 15:45–16:00, MA 141
Polymer Adsorption on Individual Single-Wall Carbon Nanotubes — •Matthias Josef Kastner1 and Tobias Hertel1,2 — 1Institut für Physikalische und Theoretische Chemie, Julius-Maximilians-Universität Würzburg, Germany — 2Röntgen Center for Complex Material Systems, Julius-Maximilians-Universität Würzburg, Germany
Polyfluorene copolymers are frequently used for the chirality-specific isolation of individualized Single-Wall Carbon Nanotubes (SWNTs). The interaction of polymers such as PFO-BPy with the carbon nanotube surface thus plays a key role in providing the desired selectivity. The objective of this work is to better understand and study the adsorption of single polymer strands on the SWNT surface by fluorescence microscopy and spectroscopy.
In the approach presented here we are using individual SWNTs, freely suspended across micron-sized trenches of a patterned SiO2 substrate and immersed in organic solvent. The adsorption of PFO-BPy is here monitored using changes in the intensity and center wavelength of SWNT exciton photoluminescence from individual nanotubes as a very sensitive probe for changes at the SWNT-solvent interface. Understanding of such adsorption processes is expected to lead into new insights which can be used for the chemical design of new selective polymers.